Zone pole for magnetic separators



UNITED STATES PATENT OFFICE.

GEORG ULLRICH,

GRU'SONWERK AKTIENGESELL GF MAGDEBURG,

GERMANY, ASSIGNOR TO` THE FIRM FRIED. KRUPP SCHAFT, OF MAGDEBURG-BUCKAU, GERMANY.

ZONE POLE FOR MAGNETIC SEPARATORS.

Application filed December 19, 1924.

To a-ZZ 107mm t may concern.'

Be it known that GEORG ULLiuor-r, citizen of' the German Republic, residing at Magdeburg, Germany, h

as invented certain new and useful Improvements in or Relating to Zone Pole for Magnetic Separators, of

which the following is a specification.

The present invention relates to zone poles such as are fitted to magnetic separators in order to grade the magnet-ic material according to its permeabi lity.

In magnetic separators heretofore known there is often placed opposite one or more poles, a counter to all those poles pole or armature common and provided, at its surface attracting the magnetic material, with edges ruiming' in terial outlet, the d1 the direction of the mastance of said edges from the other pole decreasing in the direction of the outlet for the armature forming of one single piece plates or lamellae usually having only one edge individually adjustable in relation to the other pole. These found to be of force so concen that the magnetic upon the whole breadth of the but merely upon tl material. This pole or the Zones consists either or else it is composed of or concentric rings, each or blade and edges or blades have been advantageous because the lines trate themselves in them material will not settle pole surface 1e blade or cutting` edges1 possible for it to be more easily and completely removed from these cutting edges than V case if 1t were to orv zone breadth. zone separators h would be the adhere to the entire pole Such blades have, in the eretofore known, in all cases the same same angle for each blade.

Now the invention consists in the fact that the blades,

plates tracting the or rings of the poles atmaterial are formed with blade angles increasing in the direction of the material outlet so tha t, consequently, the blade attracting the most strongly magnetic magle.

As in the case of pole lies the closer r terial has the smallest blade angle, whilst the blade attracting netic material has the most weakly magthe largest blade ansharpened poles the ideal to the point, the. greater Serial No. 757,010.

the blade angle is, and it will, with an unaltered distance between the cross sectional point and the material to be attracted, also be all the closer to the latter the greater the angle of the blade. The pole with the greater blade angle will, therefore, attract the material more strongly than, with the same gap, would be the case with a pole having a smaller blade angle. Of course the size or magnitude of the blade angle is restricted by the other condition that an effective concentration of the lines of force must always be prevalent at the cross sectional point.

The new formation of the zone poles therefore affords, in comparison with the Zone poles hitherto known, the advantage that, in addition to the concentration of the lines of force at the pole blades, an approach of the ideal pole to the blade edge is obtained, which corresponds with a decrease from zone tovzone of the permeability of the magnetic material, and consequently a greater mag- I netic influence upon the material is effected.

In order that the invention may be clearly understood and readily carried into effect it will be described with reference to the accompanying drawing which is a cross section taken through apair of cooperating magnetic poles.

The lower pole a is made with a fiat surface, the upper pole consisting of the lamellze or plates 7), o, cl while the material to be separated is guided through the magnetic field in the direction shown by the arrow. The most strongly magnetic material is attracted to the plate b. the point of which is most distant from the pole a.. The plate or lamella c at a medium distance from the pole a attracts the middle product and the plate al with the smallest distance of the three plates from the pole a, attracts the most weakly magnetic material. The blade angle is smallest on the plate b, has a. medium magnitude at the plate c and is largest on the plate d. The arangeinent is applicable to Zone separators of all kinds.

I claim:

1. A Zone pole for magnetic separators in which the blade angle is Varied in the different Zones.

2. A Zone pole for magnetic separators in which the angle of the blades forming the Zones increases from Zone to zone inthe direction of the outlet for the material'.

3. In combination, a zone pole for magnetic separators in Wliicli the angle of the blades forming tlie zones increases Jfrom 10 Zone to zone in the direction of the outlet for the material, and a complementary lat pole opposite said irst mentioned pole.

4. A magnetic separato-r as set forth in claim 3 in which the distances between the flat pole and the blades of the Zone pole decreases progressively with increase of the blade angle.l

In testimony whereof the foregoing specificat'ion is signed.

DR. ING. o. H. GEORG ULLRIGH. 

